ASBURY PARK – An apartment fire Tuesday morning at a multi-family apartment house in the city displaced an adult and three children, fire officials said.

City firefighters responded to the 10:17 a.m. fire at 510 Sixth Ave. and found heavy smoke on the second-floor, according to Garrett Giberson, a fire department spokesman.

The fire has been ruled accidental and tenants were not at home in the apartment where the fire started, Giberson said. The names of the tenants were not available.

“The firefighters made a quick and effective knock down before the fire extended to the rest of the house. They did an excellent job, especially considering the heat and humidity they had to endure,” Giberson said.

The three-story building has four apartment units and there were four tenants from different apartments who had to be evacuated, he said. The building is owned by Robert DiSanto and Joseph Ruffino and is assessed at $546,400 for 2014, according to tax records.

The three children and one adult were unable to return to the second-floor apartment where the fire started because of extensive damage, he said.

The three children were staying with a babysitter in a first-floor apartment when the fire happened and the first-floor apartment sustained water damage, he said. All other tenants were able to go back into the building and firefighters left the scene at 11:14 a.m.

No injuries were reported and the Red Cross was assisting with housing for the tenants who lived in the second-floor apartment.

Giberson investigated the fire along with the Asbury Park Police Department. Neptune firefighters responded to assist.

“Right now, it’s being listed as an accidental fire but the cause is undetermined at this time,” he said.